Oxygen bath.



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LEOPOLD SARASON, OF BERLIN, .AND Ell/LIL FRANKE, OF GR'lZiNAU, NEARBERLIN, GERMANY; SAID FRANKE ASSIGNOR TO SAID SAMSON.

QXYGEN BATH.

1l,57,281l. Ito Drawing.

Specification of Letters Patent.

Patented Mar. 19113.

Application filed Apri126; 1910. Serial No. 557,717.

To all whom, it may concern Be it known that we, LEOPOLD SARASON andEarn. FRANKE, subjects of the King of Prussia, German Emperor, andresiding, respectively, at Berlin and Griinau, near Berlin, Germany,have invented certain new and useful Improvements in Oxygen Baths; andWe do hereby declare the followin to be a full, clear, and exactdescription of t e invention, such as will enable others skilled in theart to which it appertains to make and use the same.

Our invention relates to oxygen baths.

The principal objects in the preparation of oxygen baths by a catalyticprocess are to decompose the peroxid, as evenly as possible during thecontinuance of the bath, to reduce the diameters of the free bubbles ofoxygen as much as possible, and to obtain the highest possible degree ofsaturation of the water of the bath with oxygen. As the normal power ofabsorption of the water, at bath temperature, is very slight, suflicientquantities of oxygen, to precipitate on the skin of the bathing personin the form of adhesive bubbles, can only be brought into practicaleli'ect by-the production of a high degree of super-saturation. For thisreason, the selection of a suitable catalytic is very important.

Of all the catalytics which have been used for oxygen baths, peroxid ofmanganese, either in a finished state or statu nascendz', has proved tobe the best. Even when this catalytic is used, it requires largequantities of it for eifectively accomplishin the desired result.Furthermore, peroxi of manganese, as heretofore used, produces flocks offloating undecomposed' material which are undesirable because they soilthe skin and the bath receptacles. Under preexisting conditions a bathof 250 liters of water required from 8.75 grams to 12?; grams of peroxidof manganese and 300 grams of perborate of sodium, andthe degree ofsuper-saturation obtained Was very slight, only from 2.2% to 3.5% of thevolume after thirty minutes. 7

We have discovered that a better effect is obtained by the use ofcolloidal peroxid of manganese than by the use of any of the heretoforeknown catalytics. A very much smaller quantity of this new catalyticwill suflice in the same proportions of water and oerborate of sodium.For instance, in 250 liters of water and 300 grams of perborate ofsodium, only 0.42 gram of colloidal peroxid of manganese is required. Inspite of the small quantity of this catalytic which is employed, thedegree of supersaturation obtained is about 5.1% of the volume and thebubbles are much smaller in diameter than when insoluble manganesedioxid is used. The hydrosol of manganese dioxid is only active withalkaline reaction of the water of the bath. It is particularlysurprising that the hydrosol of manganese dioxid does not form flocks,as hereinbefore described, even when perborate, percarbonate, and thelike, are used as electrolytes, although the metal-. hydrosols, as iswell known, do not act con sistently with even small quantities ofelectrolytes.

The colloidal peroxid of manganese may be used in solution or in a drystate, and either alone or in combination with other substances. Thefinished hydrosol of manganese dioxid may be dissolved in the water ofthebath or formed in the bath water from soluble salts of manganese,such as tartrate of manganese, chlorid of manga-. nese, and sulfate ofmanganese, and also from potassium permanganate by the influence of theoxygen in state; nascendz', but only very small quantities of saidingredients should be used. For instance, from three to four rams ofsulfate of manganese or tartrate of manganese, or 0.5 gram of potassiumpermanganate are usually sufiiment for the formation of the hydrosol ofmanganese dioxid. If larger quantitiesof these ingredients are used, themanganese dioxid is not converted into the active colloidal solution butappears in the more inactive flocks.

The formation of the hydrosol, which can be seen from the yellow colorof the water, is promoted by the presence of certain acids and salts,especially tartaric acid, tartrates, bisulfate, carbonate, bicarbonateand borax. The stability of the hydrosol is increased by using, at thesame time, a so-called protective colloid such as albumen, gelatin,casein, dextrin, sugar, glycerin, gum, saponin, licorice, starchysubstances, or compositions of the same.

One Way'of preparing a bath in accordance with our invention is todissolve either 300 grams of perborate. of sodium, 150 grams peroxid ofsodium or 2, liters of perand so-called protective colloids may be 10 toadd sodium carbonate, borax, or the like, 0

in order to obtain the alkaline reaction.

e We claim:

oxid ofhydro en, in 250 liters of water, and afterward ad a colloidalsolution of dioxid of manganese hich contains 0.42 gram of dioxid'ofmanganese. 'If preferred, in. lieu A composition adapted of the solutionof dioxid of manganese, 0.5 oxygen baths, comprising a substancecapagram of permanganate of potassium or 4 'ble on contact with water,of setting free grams of sulfate of manganese may be used. hydrogenperoxid, and a substance which,

s already explained, other acids and salts on contact with the watercontainin hgdrogen peroxid, will be changed into y rosol of manganese'dioxid for breaking up the hydrogen eroxid.

In testimony whereof, we aflix our signatures, in presence of twowitnesses.

LEOPOLD SABASON.

for preparing used. For instance, from 8 to 10 gramsof tartaric acid, atartrate or sodium bisulfate, or sodium carbonate, or borax, and 5 gramsof casein, albumen, saponin, or the like, may be used with thequantities ofwater, catalytics, etc., given in theabove example."

It shoul be-understood that the order in Y which the rborate and thecatalytic are Witnesses: p v added to the water may be reversed. WhenWOLDEMAR Ham,-

peroxid of hydrogen is used, it is necessary ARTHUR SCHROEDER.

